液化天然气卫星站冷能梯级优化利用

Cascade utilization of cold energy of liquefied natural gas satellite station

近年来随着中国液化天然气(LNG)产业的迅速发展,全国各地相继建设了200多座LNG卫星站,今后还将会以较快的速度继续增长。研究如何高效合理地利用这些卫星站的冷能对于节能环保、建设节约型社会有着重要的意义。文中对LNG卫星站的冷特性进行了分析,得出LNG卫星站冷能的利用特点。通过对LNG冷能梯级利用理论的分析和探讨,指出为充分高效地利用LNG卫星站的冷能应该安排一系列用户,按照温位由低到高,逐级地利用LNG的冷能,并讨论了LNG冷能梯级利用实施的关键技术,继而开发出将卫星站的冷能应用于废旧橡胶低温粉碎-室内滑冰场-果蔬保鲜库的梯级利用工艺,以期望能够达到尽量减少损失、合理利用LNG冷能的目的。

With the rapid development of liquefied natural gas（LNG） industry in China,more than 200 LNG satellite stations were built throughout the country,and they are going to grow with a faster rate.It is very important to study how to make better use of its cold energy to save energy and protect environment.The exergy of LNG was analyzed,and came to the result of the cold energy features of the LNG satellite station.Through analyzing and discussing of the theory of cascade utilization,it came up with that in order to make efficiently use of the cold energy,a series of users should be arranged from low temperature to high temperature so as to use the cold energy of LNG progressively.Besides,the key technologies of cascade utilization implementation of LNG were discussed.The proposal was presented,in which the cold energy can be applied to the cascade utilization of waste rubber cryogenic device-skating rink-preservation library of fruits and vegetables,which are expected to minimize the exergy loss of the cold energy and make rational use of it.